JDK-6982999 : tools must support -target 7 bytecodes
  • Type: Bug
  • Component: tools
  • Sub-Component: javac
  • Affected Version: 7
  • Priority: P3
  • Status: Closed
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2010-09-08
  • Updated: 2014-10-15
  • Resolved: 2011-05-17
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JDK 7
7 b128Fixed
Related Reports
Duplicate :  
JDK-7001382 - bytecode processing tools need to handle JSR 292 bytecode changes
Relates :  
JDK-7012819 - change comment in BootstrapMethods_attribute.java
Relates :  
JDK-6964498 - JSR 292 invokedynamic sites need local bootstrap methods
Relates :  
JDK-7012820 - add tests for 292 classfiles in lambda
Relates :  
JDK-6939203 - JSR 292 needs method handle constants
Relates :  
JDK-6981776 - Pack200 must support -target 7 bytecodes
Relates :  
JDK-6984311 - JSR 292 needs optional bootstrap method parameters
Description
The compiler should not crash when reading class files containing JSR 292 constructs.

In particular, the new constant pool entries described here should not cause the ClassReader to crash:

http://cr.openjdk.java.net/~jrose/pres/indy-javadoc-mlvm/

These entries are CONSTANT_InvokeDynamic (decimal 17) of length 5 bytes including tag byte, CONSTANT_MethodType (decimal 16) of length 3 bytes, and CONSTANT_MethodHandle (decimal 15) of length 4 bytes.  None of these constant pool types affect the external API of a classfile, so the compiler's class reader can skip their bytes.


This bug affects the javap command also.  The "-c" mode of javap will want to decode the new constant pool entries.

This bug is similar to one for Pack200 (6981776), which also needs to process the new constant pool entries.
Comments
EVALUATION Javac will be made to skip the new constant pool entries, of course javap must print all the relevent indy CP entries and byte codes.
30-12-2010
SUGGESTED FIX http://hg.openjdk.java.net/mlvm/mlvm/langtools/file/tip/indy-bsm-6964498.patch
08-09-2010